bootstrapped react, testing, linting, created app component

[Wmaileq]

Description of the change

• bootstrapped app skeleton, linting and testing utils
• added fonts and created UI for the main page
• added initial test

Type of change

• [ ] Bug fix (non-breaking change that fixes an issue)
• [X] New feature (non-breaking change that adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Configuration change (adjusts configuration to achieve some end related to functionality, development, performance, or security)

Related issues

Closes #1 , Closes #2 , Closes #3

Checklists

Development

These boxes should be checked by the submitter prior to merging:

• [X] Manual testing against realistic data has been performed locally

Code review

These boxes should be checked by reviewers prior to merging:

• [x] This pull request has a descriptive title and information useful to a reviewer
• [x] This pull request has been moved out of a Draft state, has no "Work In Progress" label, and has assigned reviewers
• [x] Potential security implications or infrastructural changes have been considered, if relevant

[Wmaileq]

@jessex Percent in the card made with 500 weight font, so need corresponding font file (supervision success had only 400 and 700)

[Wmaileq]

@jessex I am thinking about adding all the UI in this PR.

[Wmaileq]

@jessex feel free to merge this.